Sort through the pimento peppers and discard any that are damaged or discolored. Wash them thoroughly under cool water, then pat dry or air dry completely.
Remove the stems and slice each pepper in half lengthwise.
Line cookie sheets with parchment paper or use wire racks. Arrange the sliced peppers in a single layer on the trays.
Place the trays into a low oven set to 140°F (60°C) or into a food dehydrator.
Allow the peppers to dehydrate for 12–14 hours, or until completely dry and brittle.
Once cool, pulse the dried peppers in a food processor to your desired texture — coarse flakes or fine powder.
Transfer to airtight containers and store in a cool, dark place.
Enjoy all winter long — the flavor of dehydrated pimento peppers is rich, concentrated, and deeply Caribbean.